-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 On 23.10.2014 01:39, Lev Serebryakov wrote:
> (1) Why rational resampler doesn't take decimation in account when > calculates bandwidth? It design filter which will correctly reject > all images in upsample, but looks like aliasing is possibly when > effective ratio is less than 1, as only interpolation is used in > bandwidth calculation and resulting filter "effectively" works at > upsampled rate. Here I'm right, according to other thread. > (2) Why arbitrary resampler set Fs to number of filters and AFTER > that pass bandwidth numbers as normalized to 1, not to this Fs?! > 0.3 is perfectly good (may be slighly conservative, but Ok) > transition band center, but in this case this 0.3 will be taken for > FS=1, and here FS=32 (number of filters) is used, so it will be 32 > times too low (!). And here I'mn wrong, and code is right, as filter effectively work and "higher" frequency and all frequencies should be properly scaled. - -- // Black Lion AKA Lev Serebryakov -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (MingW32) iQJ8BAEBCgBmBQJUT4WZXxSAAAAAAC4AKGlzc3Vlci1mcHJAbm90YXRpb25zLm9w ZW5wZ3AuZmlmdGhob3JzZW1hbi5uZXRGOTZEMUNBMEI1RjQzMThCNjc0QjMzMEFF QUIwM0M1OEJGREM0NzhGAAoJEOqwPFi/3EePvfAQAIljuBr95qllFCA49uBqTtjQ sZq9bCrTR+gYfrNgPEb10GO/8981cmN+4eJFEiJRPVf9g5I1uSqa0vDiqPuyDXCQ DQIxbsvGi+F82FpWEZRm3OWuoYHoY/MNm+T8evkOL+LKG4Fo7ohgFghDnZ6csaY/ 0h0BLFUkBV9cGW2Havy0RWR5QZoRQnc9ATwUdYuVY7HeIbFKET3E+IJp36yC82lc yyMRfneCTvHuMC59M4OO138ZmXkL4h+OptdQKd094IVNlpMEJyw0q+XQFukSj/RD t+gx3tPNgW9uII7syUYk11ASmZc17NcFQEdSoEIuRNdhkp3UzEeCSUMrRk1DN+ki HiZcMDJ4rWXhKv7hJ8QIhcvQOmHxjnqV0izjir6YChIKbibp8pSRajoL2jRm5726 MoezAPmG5jmAuqaw0nacXgIZCombMWNS7KQkn901VKBDypGpRCdS/GUi7bvmOhB/ PEEvL51grQ6pCXgUnnJ2rYlEKmBlPxIU8CAmGxUW5oEWnr2TLnFc9X27bFiTsS0I y2pLqhCOzaCzKxL+Et0mZM/7eof932DNnoesjqw/VBGDlDZPPc8+svlwHn7KjiVY Go3AcqUzIfVED1MkZGs9wgWzaQJX7bS9jdQPy5mhJfcs5/cUdN4BWV0VLcq2yeew wjVJtxt1ReS3OaXy7bDX =hyaw -----END PGP SIGNATURE----- _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
